[DOC] Russian strings should look Russian

Merged: https://github.com/ruby/ruby/pull/15594

doc/string/aset.rdoc

@@ -170,9 +170,9 @@ With string argument +substring+ given:
   s['ll'] = 'foo'  # => "foo"
   s  # => "hefooo"
 
-  s = 'тест'
-  s['ес'] = 'foo'  # => "foo"
-  s  # => "тfooт"
+  s = 'Привет'
+  s['ив'] = 'foo'  # => "foo"
+  s  # => "Прfooет"
 
   s = 'こんにちは'
   s['んにち'] = 'foo'  # => "foo"

doc/string/bytes.rdoc

@@ -1,7 +1,7 @@
 Returns an array of the bytes in +self+:
 
-  'hello'.bytes # => [104, 101, 108, 108, 111]
-  'тест'.bytes  # => [209, 130, 208, 181, 209, 129, 209, 130]
+  'hello'.bytes  # => [104, 101, 108, 108, 111]
+  'Привет'.bytes # => [208, 159, 209, 128, 208, 184, 208, 178, 208, 181, 209, 130]
   'こんにちは'.bytes
   # => [227, 129, 147, 227, 130, 147, 227, 129, 171, 227, 129, 161, 227, 129, 175]
 

doc/string/bytesize.rdoc

@@ -5,9 +5,9 @@ Note that the byte count may be different from the character count (returned by
   s = 'foo'
   s.bytesize # => 3
   s.size     # => 3
-  s = 'тест'
-  s.bytesize # => 8
-  s.size     # => 4
+  s = 'Привет'
+  s.bytesize # => 12
+  s.size     # => 6
   s = 'こんにちは'
   s.bytesize # => 15
   s.size     # => 5

doc/string/center.rdoc

@@ -9,7 +9,7 @@ centered and padded on one or both ends with +pad_string+:
   'hello'.center(20, '-|')      # => "-|-|-|-hello-|-|-|-|" # Some padding repeated.
   'hello'.center(10, 'abcdefg') # => "abhelloabc"           # Some padding not used.
   '  hello  '.center(13)        # => "    hello    "
-  'тест'.center(10)             # => "   тест   "
+  'Привет'.center(10)           # => "  Привет  "
   'こんにちは'.center(10)         # => "  こんにちは   "      # Multi-byte characters.
 
 If +size+ is less than or equal to the size of +self+, returns an unpadded copy of +self+:

doc/string/chars.rdoc

@@ -1,7 +1,7 @@
 Returns an array of the characters in +self+:
 
   'hello'.chars     # => ["h", "e", "l", "l", "o"]
-  'тест'.chars      # => ["т", "е", "с", "т"]
+  'Привет'.chars    # => ["П", "р", "и", "в", "е", "т"]
   'こんにちは'.chars # => ["こ", "ん", "に", "ち", "は"]
   ''.chars          # => []